Machine to manufacture soda and sulfite wood-pulp.



P. B. PALMER. MACHINE T0 MANUFACTURE SODA AND SULPITE WOOD PULP.

APPLICATION FILED MAY 20, 1909-.

956,728, Patented May'3,1910.

SHEETS-SHEET 1.

P. B. PALMER.

MACHINE T0 MANUFACTURE SODA AND SULPITE WOOD PULP.

APPL IOATION FILED Mn 20, 1909.

956,728. I Patented May 3', 1910.

2 SHEETBBHEET 2.

UNITED PERLEY B. PALMER, F ORONO, MAINE.

MACHINE TO MANUFACTURE SODA AND SULFITE WOOD-PULP.

Specification of Letters Patent.

Iatenteil May 3, 1910.

Application filed May 20, 1909. Serial No. 497,368,

To all whom it may concern:

Be 1t known that I, Penman, B. PALMER, a

"citizen of the United States, residing at Orono, in the county of Penobscot and State of Maine, have invented a new and useful Machine to be .Used in the Manufacture'of Soda and Sulfite Wood-Pulp, of which the following is a specification.

' My inventiog, relates to improvements in blow-pits used 1n the manufacture of soda and sulfite wood-pulp, to be used in congunction with the other parts of the machinery 111 common use in the manufacture of soda and sulfite wood-pulp; and the objects are,first, to secure greater economy of s ace than can be secured by cylindrical b ow-pits of a corresponding height, now in use; second, to secure a relatively larger filtering and drainage area than is the case with blow-pitsnow in use, and a more rapid escape-of thewaste liquid than is the case with the blow-pits now in' use, hence an economy of time and increase in efiiciency in the process of washing the pulpstock' over that/of the blow-pits in common use, and,

' third, at more. rapid, easy, and complete sluicing of the pulp stock to the pump than is the case with the blow-pits now in use. I

attain these objects by the mechanism illustrated, in. the accompanying drawings, in

w ich Figure lrepresents the longitudinal ele vation: and' a partial longitudinal vertical section or the blowit; Fig. 2 a vertical cross section of the b ow-pit; Figs. 3 and 4,

- the split -n 1 etallic ring around the base of cradle of-thc hlowit and the method of fas-.

the ventpipe and the attachments of the metallic hoops of the blow-pit thereto; Figs. 5 and 6, the metallic frameabout the manhole and the attachments of the hoops ofthe blowit thereto; Figs. 7 and 8,'the reinforce bands.. of' metals supported by the teningthe staves o the blow-pit to them.

Fig. 1 represents the longitudinal elevation and a partial section,;a-b c d, of the machine (blow-pit) whieh is cylindrical, of aconvenlentlheight and of a length dependin on the size of the digesters connected with it. Because of its horizontal position, this blow-pit has two or three times the ca- Y gacity, of the common vertical cylindrical low-pit unless the digesters connected with the latter are laced at an elevation which would ordinari y be inconvenient. 1 The filter, la la, in Figs. 1 and2, made of matting orother su-itablematerial and extending the length of the blow-pit, is in its crosssection the arc of a circle, thus securing a relatively greater filtering area than that of the blow-pits now in use. This filter is kept in place by the supports, 0 0, as shown in Figs. 1 and 2, these supports being pierced with holes p p, Figs. 1 and 2, to allow the escape o the waste liquid to thewaste-pipe, r. This flow of the waste liquid to the wastepipe and of the washed pugp to the pump-pipe, s, is greatly facilitate by the circular shape of the bottom of the blow pit and of the filter, this advantage being also increased by the elevation of the end, w, of the blow-pit-four or five'inches higher than the end y.

If the blow-pit is made of Wood, it rests on cradles ofvconcrete or of other suitable material, the tops of which rise to half the height of the blow-pit, f f in Figs. 1 and 2. These cradles also support heavy reinforced bands of metal, m m, to which the plank staves of the blow-pit are firmly fastened by bronze bolts, as shown in Figs. 7 and 8; these serve to keep the plank staves from bending or saggin From one of these re inforced bands a heavy metallic plate, 9 g in Figs. 1 and 2, is sus ended so as ,to swing .freely in the longitu mal direction of the blow-pit. This plate is a target or butt, about four feet square and two inches thickagainst which the pulp is thrown when blown into the blow-pit through the' diges 'ter pipe, 71., and serves to comminujte any of the chips whose form has not been de-. -stro ed by cooking in the digester, and

to 'istribute the pul evenly in the'-blowpit. Oiving to the istancc of this target from the vent-pipe, n n in Figs. land 2, much less pulp 48 carried up through the vent-pipe into the vomit-tube than is the case with the cylindrical blow-pits now in use.

In- Figs. 3 and 4 is shown a device for firmly fastening the vent-pipe to the blowit and for avoidin the weakness the atter that would ordinarily existas aficonse quence of the-opening. This devices? is a .heav'y metallic 'ring, 25 t, with a collar, 13 a;

1 This ring is made. up of two equal pairts drawn together b screw-bolts at o o, -,so' that the strain of the hoo s will not comeion' the junctionof the two alves' of the The iron hoops ofthe blow-pit are ex as rods with screws through slots in the collar of the ring, Fig. 3, and the hoops are drawn tight b the means of nuts. A similar device is a olited for fastenin the hoops to the' frame of t e manhole, z in ig. 1,-and is shown in Figs. 5 and 6.

, I am aware that there have been in use for more than two years prior to my invention cylindrical blow-pits, placed upright, however, used in the manufacture of soda and sulfite wood-pulp, also filters made of plank pierced with small holes, of cocoa matting and of other suitable material, but not of the shape or location as the one above described, also cradles of concrete and of other suitable material similar to those above described and serving a similar purpose.

filter as above described.

2. The combination in a blowit used in the manufacture of soda or su fite woodpulp of a cylindrical pit laced horizontally, as above described, an a hangin target or butt, as. above described and set %orth.

PERLEY- B. PALMER.

Witnesses:

ALLEN E. Rooms, MERRITI C. FERNALD. 

